Composition of matter for closing punctures in pneumatic tires.



UNITED STATES PATENT OFFICE.

CHARLES F. BURR AND JOHN S. HENDRIOKSON, OF SAN FERNANDO, CALIFORNIA.

COMPOSITION OF MATTER FOR CLOSING PUNCTURES lN PNEUMATIC TIRES.

SPECIFICATION forming art of Letters Patent No. 633,638, dated September 26, 1899.

Application filed Tune 9, 1899. Serial No. 719,954r (No specimens.)

To all 1071 0772 it may concern:

Be it known that we, CHARLES F. BURR and JOHN S. HENDRIOKSON, citizens of the United States, residing at San Fernando, in the county of Los Angeles and State of California, have invented a new and useful Composition of Matter to be Used in Single-Tube Pneumatic Tires to Close all Small Holes Therein and Prevent the Escape of Air Therefrom, of which the following is a specification.

Our composition consists of the following ingredients combined in the following proportions, viz: boiled cactus-sap, ninety-five parts; salicylic acid, three parts; anilin, one part; oil Sassafras, one part. The sap of the cactus is obtained in any suitable manner. \Ve have found. that the sap of the species known as Cactus tuna gives good results. The sap is boiled over a moderate fire for an hour to an hour and ahalf, depending on the character of the sap, to give it the consistency of ordinary syrup. WVhile boiling, the sap should be skimmed to remove any impurities. After being boiled the required length of time, salicylic acid, anilin, and oil of Sassafras in the proportions above stated are added and thoroughly stirred in While the sap is hot. After coolingit is bottled for use.

The compound is introduced into the tire in the usual manner. It will permeate all punctures and small holes and stop all leaks in the tire.

We use the anilin to give the compound a color which is preferable to the natural color of the sap and the oil of Sassafras to give it an agreeable perfume. These ingredients may, however, be omitted without affecting the usefulness of the compound and are not essential thereto.

The salicylic acid is used as a preservative to keep the sap from souring, whichit would do without some preservative. WVe do not desire to limit ourselves to the use of salicylic acid alone, as it is obvious that other preservatives may be used with the sap to keep it from souring.

\Vhat we claim, and desire to secure by Letters Patent, is-

The herein described tire closing com- 

